Stacked Substrate Light Emitting Device Circuit Integration
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Solution Overview
Problem
Existing light emitting device structures face limitations in increasing the density of light emitting elements due to the integration of driving circuits, which restricts the miniaturization and density of light emitting elements.
Innovation Solution
A light emitting device with a stacked structure of first and second substrates, where part of the driving circuit is arranged in the first substrate and another part in the second substrate, allowing for high-density arrangement of light emitting elements without reducing the size of each transistor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If driving circuits are integrated in one substrate with light emitting elements, then high integration is achieved, but the density of light emitting elements cannot be increased further
Solution Approach 1:
The driving circuit is divided into two separate substrates: a first substrate containing light emitting elements and a first driving circuit, and a second substrate containing a second driving circuit. This segmentation allows each substrate to be optimized independently, enabling higher density of light emitting elements on the first substrate while maintaining full driving functionality through the combined two-substrate architecture.
Solution Approach 2:
The patent transitions from a single-substrate two-dimensional integration to a multi-substrate three-dimensional stacked architecture. By stacking the first substrate with light emitting elements over the second substrate with additional driving circuits, the system achieves higher integration density without constraining the layout on individual substrates, thus allowing increased light emitting element density.
2Quantity of substance
If light emitting elements are miniaturized to increase density, then higher density is achieved, but the size of transistors must be reduced
Solution Approach 1:
By separating the driving circuit functionality across two substrates, the patent allows the first substrate to be dedicated primarily to light emitting elements with minimal transistor infrastructure, while the second substrate houses additional driving transistors. This enables light emitting elements to be arranged at higher density on the first substrate without being constrained by transistor size requirements that would exist in a single-substrate integration.
Data Source
AI summary
A light emitting device has a structure in which a first substrate and a second substrate are stacked. The device includes a plurality of light emitting elements, and a driving circuit configured to drive the plurality of light emitting elements. Part of the driving circuit is arranged in the first substrate, and another part of the driving circuit is arranged in the second substrate.